Finding the Fourth Proportional to 76,398.17, 105,427.45 and 42,406.56

Step by Step Solution

1. Step 1: Write the proportion equation
   76,398.17 : 105,427.45 = 42,406.56 : x
2. Step 2: Convert to fraction form
   76,398.17/105,427.45 = 42,406.56/x
3. Step 3: Cross multiply
   76,398.17x = 105,427.45 × 42,406.56
4. Step 4: Simplify right side
   76,398.17x = 4,470,815,484.07
5. Step 5: Solve for x
   x = 4,470,815,484.07/76,398.17
6. Step 6: Final answer
   x = 58,519.93